Apparatus for feeding anti-incrustation compounds to boilers.



Patented Feb. a, moo.,

11.. swEENEv. Y MPARATUS FUR FEEDINE ANTI-INCRUSTATIUNCOMPUUNDS 'iBOILEZRS.

' (Application filed Dec. 11, 1897.)

` z sheets-sheet l.

(No Model.)

TH: mams PETERS cc. Pxofouw.. wAsHiNomu. n. c.

No. MILM. Patented Fab. 6, |9040.

T. .L SWEENEY.

APPARATUS FOR FEEDING ANTl-INGRUSTATION CUMPDUNDS "T0 BDILERS.

(Application led De. 11, 1897.)

2 Sheets-Sheet 2.

l ivrrnn drains PATENT Onrrcn..`

THOMAS J. SWEENESHOF DETROIT, MICHIGAN.

APPARATUS FOR FEEDING ANTI-INCRUSTATION COMPOUNDS TO BOILERS.

SPECIFICATION forming part of Letters PatentpNo. 643,074, dated February6, 1900. Application led December l1, 1897. Serial No. 661,486. (Nomodel.) i

To LZZ whom t may concern,.-

Be it known that I, THOMAS J. SWEENEY, a citizen of the United States,residing at Detroit, county of Wayne, State of Michigan, have invented acertain new and useful Improvementin Apparatus for FeedingAnti-Incrustation Compounds to Boilers; and I de- Clare the following tobe a full, clear, and eX- act description of the invention, such as willenable others skilled in the art to which it pertains to make and usethe same, reference being had to the accompanying drawings, which form apart of this specification.

This invention relates to apparatus for feeding anti-incrustationcompounds to boilers, and has for its object an improved means ofintroducing into boilers a substance calculated to remove scale that hasbeen formed or to prevent the formation of scale or sedimentary deposit.I have found, experimentally, that wit-h certain classes of injectors anattachment may be made to the injector itself so arranged as to feedinto some part of the injector which communicates with the feed-Watertubes that are included in the body of the injector and are known by theseveral terms the jet-tube, the suction-tube, and the delivery-tube, andI have chosen as the injector which I wish to use to illustrate myinvention the one shown and described in the patent granted October ll,1892, to William Pemberthy; but I do not wish to confine my claim ofinvention to the use of a feeding device in connection with thatparticular injector, because similar results may be attained by the useof other inj ectors with feeding devices for anti-incrustation compoundsproperly attached thereto.

In the drawings, Figure 1 shows the feeding device attached to theinjector and feeding into the Waste-water or overflow chamber. Fig. 2 isa det-ail of a feed-tank.

A indicates the injector, which is shown in the drawings as beingprovided with a removable blind cap A and which contains the severalexhaust-chambers B, D, and E, the first chamber being a suction-chambersurrounding the delivery of the jet-tube and the mouth of thesuction-tube, the second chamberD being a spill-chamber oroveriiow-chamber surrounding the delivery of the suctiontube and themouth of the combining-tube,

and the chamber E being an overflow-cham'- ber surrounding thecombining-tube,wth the interior of which it has communication through anumber of small openings f. The only outlet from the suction-chamber Bis into the suction-tube G. The overflow-chamber D has leading into itat one side the suctiontube and out of it at the other side thecombining-tube I. The ends of these two tubes approach closely together,but do not form a continuous tube. There is from this chamber D a secondoutlet leading to the overflow, and this second outlet is commonlyclosed by a check-valve H, (shown in the drawings as a ball-valveg) butfor this ball-valve is sometimes substituted a clack or flap valve. Thesecond overiiow-chamber E also has a checkvalve H at the opening, whichleads into the outflow-pipe F. When the injector is working normally,there should be no overiiow, as all the Water drawn into the suctiontube B should be carried through the combining-tube and into the boiler,and the check-valves I-I and H' should be drawn by the exhaust againsttheir seats. This being the case, it is possible while the injector isworking normally to make au opening through the case into theexhaust-chamber D or E,or inasmuch as there is a `constant suction intothe chamber B it is possible to lead a feed-pipe for theanti-incrustation compound into the chamber B; but inasmuch as theinjector does not always work exactly normally it is necessary to pro-.vide means to prevent improper outow or backliow of liquid-either theanti-incrustation compound or the hot -Water passing through theinjector-and to prevent any improper backHoW of liquid I place in thefeedpipe which I attach into the casing a checkvalve properly located.

C indicates a suitable tank for the storage of a quantity of theanti-incrustation liquid. This may be any f the well-knownanti-incrustation liquids, such as oil, potato-water, hemlock-barkwater,or any other of the many liquids appropriate to the particularqualities of water used in the boiler.

The tank C maybe located at any distance from the injector and isconnected therewith by a pipe c, in which there is at a proper place aregulating-valve d, arranged to regulate the quantity of the liquidflowing into the boiler.

IOO

In the pipe c, near the place where it is attached to the injector, is acheck-valve opening by gravity downward and arranged to be closed by theback pressure from the injector if at any time the injector should ceaseits normal work and the overii oW should accumulate enough to produceback pressure.

The tank C may be above or on a level substantially with the injector,as when so located the anti-incrustation liquid would feed into theinjector by gravity, or if exactly on a level or slightly above thelevel it would feed because of the suction of the injector. It is notdesirable to rely on the suction of the injector,

but rather desirable to rely upon a gravityfeed. Into whichever of thethree chambers the pipe may be tapped the result will be subp stantialiythe same.

As a further safeguard I employ with the tank C a check-valve arrangedto close the bottom of it when it has been emptied of liquid, and forpurposes of inspection I place at the outlet of the tank C a sight-feedglass, through which the oil drops on its Way to the injector.

7L indicates the sight-feed glass, which is held between the gaskets hand h2 in a properly-formed cage that connects the end of the pipe c.

Across the tank C at a suitable distance above they outlet is aforaminous diaphragm which serves the double object of a strainer and acage to prevent the iioat ball-valve r from escaping. The ball-valve ris adapted to close against a properly-formed seat S, that forms themouth of the outlet-nozzle 1f. The float-valve r is light enough tofloat in any of the anti-incrustation liquids used and rises to thediaphragm C' whenever the tank is filled with liquid. When the tank isemptied, the float-valve r falls and closes the openings into the pipec. If by any chance the checkvalves within the injector fail to actproperly, the valve r will be drawn by the injector-suction to its seat.

What I claim is- 1. The combination with an injector provided with anoverflow-chamber communicating With the combining-tube thereof so as topermit the return of the Water from the overliow-chamber to thecombining-tube, of a feed-pipe for an anti-incrustation compoundarranged to deliver the compound into said overtiow-chamber, and acheck-valve in said pipe arranged to be operated to cut off the fioW ofthe compound by an overflow of the feed-water into saidoverflow-chamber, substantially as described.

2. In combination with an injector comprising a combining-tube and achamber surrounding the same, a feed-pipe for an antiincrustation liquidleading to the chamber 4. In combination with an injector provided Witha combining-tube, and an overflow-chamber surrounding said combiningtubeand communicating therewith at the lower part'of the overflow-chamber,of a feedpipe for an anti-incrustation compound arranged to deliver thesame into said overiiowchamber, and a valve in said feed-pipe arrangedto be operated to shut off the flow of the compound by an overiiow offeed-water into said overliow-chamber.

In testimony whereof I sign this specification in the presence of twowitnesses.

THOMAS J. SWEENEY. Witnesses:

CHARLES F. BURTON, VIRGINIA M. CLoUGH.

